Siemens 3RU2116-1AB0 Sirius Thermal Overload Relay

Siemens SIRIUS 3RU2116-1AB0 is a three-pole, size S00 thermal overload relay in the SIRIUS 3RU2 family, designed for mounting on 3RT2/SIRIUS contactors. It provides adjustable overload protection for motors, with a current range of 1.1 to 1.6 A and class 10 thermal trip; it features screw-terminal main and auxiliary circuits and can be used in stand-alone installations with manual-automatic reset. Rated for up to 690 V (50/60 Hz) in the main circuit, it consumes about 5.1 W of power loss, and the unit weighs roughly 0.978 kg; its insulation voltage is 690 V and surge resistance up to 6 kV. Operating conditions span -40 to +80 °C and up to 90% relative humidity; the device is intended to protect loads such as motors in conveyors, pumps, or fans by interrupting current to prevent overheating due to overload or phase failure. With screw terminals for both main and auxiliary circuits and a manual-automatic reset, the 3RU2116-1AB0 is suited for retrofit or new installations where compact, reliable motor protection is required.